Cutting device for printing-machines.



J. JACOBS & A. NBPGEN.

CUTTING DEVICE FOR PRINTING APPLICATION FILED NOV. 9, 1911;

*Patentem July 14, 19m

JOSEF moons,

CUTTING nnvicn ron rRrn'rinG-Mncmnns.

To all whom it may concern Be it known that we, Josnr Ell-icons, a subject of the King of Prussia, and resident of Buisdorf, near 'Cologne-on-the-Rhine, Germany,- and Auoosr Nansen, a subject of the King of Prussia, and resident of Siegburg, near Cologne, German Empire, have ointly invented anew and useful Cutting Device for Printing-Machines, of which the follou whereb when the printing cylinder is exchange the length of sheet cutby the cutting mechanism will be varied to correspond to the size of the particular printing' cylinder in use without necessitating any other variation than that of exchanging the printing cylinders.

In carrying outthe invention the rotatable cutter is geared up to the printing cylinder in such a manner asto be'driven therefrom at the same angular velocity as the printing cylinder. By this means it follows that when theprinting cylinder is exchanged, say, for example, for a cylinder of larger'diameter, the Web of paperwill be traversed at a greater speed and will consequently be fed past the rotary cutter greater'speed. As "the rotary cutter, however, rotates at the 'saine angular velocity as before, it, follows that the printed web of paper Will be cut into sheets ofa longer length and of a lengthcorresponding to the circumferential dimensions of the prlnting cylinder inserted. Thus it will be" readily I vseen;- that,.by merelyfzexchanging the printing' cylinderfthe lengthv ofkthe sheets out is simultaneously and correspondingly varied.

The printed web is fed to the rotary cutter 'at the same surface speed as-the printing 'oylinderby means of tension rollers driven from the impression cylinder, the tension rollers beingrotated at a somewhat greater at a- Speeification of Letters Yateut. v PatentgdJuly 14 1914, Application ,filed November 9, 1911. Serial No. (69,318.

surface speed than the printing cylinder to allow for'stretcliip the paper,

If desired the sheets may thereafter be fed to any suitable type of printing machine in order to print on one or both sides of the sheets and said additional printing machine may be driven from the printing roller of the first printing, machine, so that both the printing machine and the cutting device are driven at the same speed. It will how-.- ever be readily understood that the two printing machines can only be combined when the cut-ting device is interposed. 4

In order that the invention may be more clearly understood, reference is made to the accompanying drawings whichshow by way of exaniple the preferred method of carry ing out the invention, the figureilhistrating the combination of two printing machines between which a cutting device is interposed. I I

0: indicates the paper supply roll, from which the paper is guided over guide rollers b and 0 between theprinting roller (5 and pressure roller 9 of a rotary printing machine. The paper is thereafter led v over guide rollers f and g to; and between tension rollers 71 h, k andthence overa stationary table a which terminates at 'its,de livery end in aknife ed'ge adapted to-coact with a knife m mounted upon a rotatable and h are geared together by means of a chain 00 passing a'roun suitable chain wheels mounted on the axles of the rollers k h,

The ratio of the gearing betweenthe tension roller hand the pressure rollerejs'arranged so that 'theten'sion rollers rotate at a.- some what'greater surface speed; than the printing' roller d. For example ifcthe printing roller is adapted to printone meter length of paper per'unit of time, the gearing between the pressure roller 6 and tension roller h isso chosen, that the tension rollers h It rotate at a surface speed 015101 cm.

erunit of time so as to constantly maintain tfte paper under tension.

OF BUISDORF, AND AUGUST NECEGEN, 0F SIZEGB'URG, NEAR COLUGNE, i GERMANY; SAID JACOBS ASSIGNQR T0 SAID NEFGEN. 4

' The shaft 1) bf the rotatable cutting knife m is driven by means of a gear wheel 3 thereon, gearing with the gear Wheel a mounted on a shaft 2 which carries a chain wheel 12 driven by means of a chain 0 pass ing around a chain Wheel 39 mounted upon the shaft of the printing roller a1,- The ratio of the gearin between the printing roller (Z and rotata le shaft 2: of the, cutting knife m is such that theangular velocity of .the cutting knifem is the same as that of the printing roller (Z so that the cutting knife m ion co-actingat each rotation with the knife edge of the table 2' cuts the paper strip into sheets of a length corresponding to the circumferential dimensions of the printing roller-d. The cut sheets fall into any suitable form of.endless conveyer fply roll, the combination with an exchange ,q from whence they are taken by a gripper r on the printing roller 8 of asecond printsides of the sheets. Q

The drivin r chain wheelt of the second printing machine may directly driven from a chain 'wheelmounted on the shaftof the printing ,roller' d'fitof the first printing machine by means of a chain 20. It will of course be-readily understood that if desired the chain gearing, may, be substituted by any othcr suitable form of driving mechanisnn 3Ve clai1n:- I

1. In a rotary printing machine for printing on aZWeb of paper supplied from a supply roll, the combination with an exehangeable printing cylinder and an impression cylinder friotionally driven the one from the other; of a rotary cutter for cutting the printed web into sheets of a length corresponding to'the size of printing cylinder and means for driving the rotatable cutter from said printing cylinder at the same angular velocity the printing cylinder, whereby, when the printing cylinder is exchanged and without necessitating any tinge in gearing, the length of sheet cut by 'said cutter will be automatically and correspondingly varied.

2. In a rotary printing machine for printing on a web of paper supplied from a suping machine adapted to print on one or both able 'printing cylinder and an impression ieylinder frictionally driven the one from ;-the other'yof a rotary cutter for cutting the printed web into sheets of a length oorre-- sponding to the size of printing cylinder,-

'velocity as the printing cylinder, whereby, when the printing cylinder is exchanged and without necessitating anychange in gearing,-the length of sheet out by said cutter will be automatically and correspondingly varied, tension rollers -interm ediate said cylinders and cutter and driving mech-,

anism for rotating said tension rollers from said impression cylinder at a somewhat greater surface speed than the printing cylinder. v

3. In a pri'nting machine for printing on a web of paper supplied from a supply roll, the combination with a guide roller and a printing roller for printing one side of the paper, of-tension rollers, a table over which the paper passes from the tension rollers,

an endless conveyer, means coacting with the table for cutting the paperinto sheets and delivering said sheets directly onto the conveyer, and a second printing roller onto which the sheet of paper is delivered from said conveyer for printing its other side.

4. In a rotary pr nting machine for printing on one side of a web of paper supplied from a supply roll, the combination with. an exchangeable printing cylinder and an imression cylinder frictionally driven the one rom the other; of a rotary cutter for cutting the printed web into sheets of a length corresponding to the size of printing cylinder, means for driving the rotatable cutter from said cylinders at the same angular velocity the printing cylinder, whereby, when the printing cylinder is exchanged, the length of sheet out by said cutter will be automatically and correspondingly varied, a conveyor to which the sheets are supplied, a second printing cylinder to which the sheets are delivered from said conveyer for printing the other side thereof, and mechanism for rotating said second printing cylinder from the first mentioned printing cylinder.

In witness whereof we have hereunto set our hand in thepresence of two witnesses.

- JOSEF. JACOBS. I AUGUST NEFGEN.

Witnesses:

OLGA Hiisnnron, M. Knnrrnns. 

